package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param dto
     */
    @Override
    public void add(EmployeeDTO dto) {
        Employee emp = new Employee();
        BeanUtils.copyProperties(dto,emp);
        //设置默认密码
        emp.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //设置时间
//        emp.setCreateTime(LocalDateTime.now());
//        emp.setUpdateTime(LocalDateTime.now());
        //设置状态
        emp.setStatus(StatusConstant.DISABLE);
        //设置用户参数
//        emp.setCreateUser(BaseContext.getCurrentId());
//        emp.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.insert(emp);
    }

    /**
     * 员工分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO dto) {
        //调用分页插件
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        //调用Mapper进行分页查询
        Page<Employee> page = employeeMapper.pageQuery(dto);
        //封装返回结果
        Long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total,records);
    }

    /**
     * 启用或禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        Employee emp = Employee.builder()
                .id(id)
                .status(status)
                .build();
        employeeMapper.update(emp);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee emp = employeeMapper.getById(id);
        return emp;
    }

    /**
     * 修改员工信息
     * @param dto
     */
    @Override
    public void update(EmployeeDTO dto) {
        Employee emp = new Employee();
        BeanUtils.copyProperties(dto,emp);
//        emp.setUpdateTime(LocalDateTime.now());
//        emp.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.update(emp);
    }

}
